• the square drive gives a neat finish and enables a strong hold when fixing
• Made of Stainless steel 410 which is superior to regular steel and zinc plated fasteners, the case-hardened, extruded-thread wood screw has threads that are very deep and sharp.
• Tin & Zinc based mechanically deposited high anti-corrosive Ruspert Coating to provide additional cover against scratches, gas and weathering
| Size | 2.2×9.5mm–6.3x100mm |
|---|---|
| Material | Stainless Steel 410/304 / 316, Carbon Steel, Alloy Steel And So On |
| Head Type | Flat,countersunk |
| Drive Type | Phil, Torx, slotted, Phil & Slotted combination, Hex Socket, square |
| Thread | Full Thread, Partical Thread, Tapping Thread |
| Surface Treatment | Passivation, polished, Black Phosphate, Gray, HDG, Ruspert, Nickel, Electroplating (color, blue, white, black zinc, Ni, Cr, tin, copper, silver), Black oxide coatin, ruspert |
| Packing | Bulk in cartons (25kg Max.) + wooden pallets or according to customer demand. |
| Application | Metal, timber, plywood, laminates, some plastics. |
A countersunk or as regularly shortened as CSK Screw is a fastener that is sunk into a piece of lumber.
The heads of the Stainless Steel Countersunk Screw will sit below the surface of the material.
A/AB Sheet Metal Screws- Sheet metal screws are engineered for connecting thinner metal objects to one another or connecting metal to wood, plastic, and other materials.
Type A sheet metal screws have wider spaced threads for self-starting in thinner metal or plywood.
Type AB sheet metal screws have more threads per inch and are more effective in brittle materials than Type A.
Fastener SS304/SS316 Body + SS410/420/CS Point, Self Drilling/Tapping Roofing Bi-Metal Screw with SS EPDM Washer
Our bi-metal screw is made by welding stainless steel together with SS420 or carbon steel.
Its head and body is composed of 300 series stainless steel for corrosion resistance, and its point is composed of SS420 or carbon steel hardened for self-drilling and self-tapping.
Our sharp point bi-metal screw drill capacity is up to 1mm+1mm galvanized steel plate without pre-dirlling, which improves work efficiency for projects.

The SuperFix Bi-metal Screws are well tested such as:
· Hardness
· Torque test
· Wring Force
· Tensile Strength
· The shear stress
· Extraction resistance and pull through
· Coating thickness SST (up to 1500 hrs)
10-4-8 Wanghai street, Haiyan, Jiaxing
314300 China
Tel: +86-573-86921959
Email: info@drillingscrews.com
We will contact you within 1 working day, please pay attention to the email with the suffix “@drillingscrews.com”.